Type-writer.



G. W. DONNING.

TYPE WRITER.

APPLIGATION FILED ,.TAN. 19.1906.

G. W. DONNING.

TYPE WRITER. APPLICATION FILED JAN.19, 190s.

929,839. Patented Aug. 3, 1909.

M 5 SHEETS-SHEET 2.

WJTNESSES G. W. DONNING.

TYPE WRITER. APPLVIOATION FILED JAN. 19, 1906.

Patented Aug. 3, 1909.

5 SHEETS-SHEET 3.

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G. W. DONNING. TYPE WRITER.

PPLIOATION FILED JAN. 19, 1906.

929,839. Patented Aug.3,19o9.

5 SHEETS-SHEET 4.

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G. W. DONNING.

TYPE WRITER.

APPLICATION FILED JAN. 19, 1906.

929,839. l Patented Aug. 3, 1909.

5 SHEETS-SHEET 5.

NVENTORI Mvg@ 0W o wmmg,

hllldllf EAENT OFFQEQ GEORGE W. DONNING, OF STANFORD, CONNECTICUT, ASSIGNOR TO HARRY T. AMBROSE, OF ORANGE, NEW JERSEY.

TYFE-NVRTTER.

no. .e2-asas.

T 0 all whom it may concern:

Re it :nov-fn that T, Geenen W. Borrarme, a citizen ot the TLlnited. States, residing at Stamford, in the coun ty of Fairfield and State of Connecticut, have invented certain new and useful improvements inlype-. iiters; and I do hereby declare the following to be tull, clear, and exact description of the invention, such as Will enable others skilled in the art to Which it appertains to malte and use the same.

This invention relates to {iat-platen type- Writers, and more particularly to automatic locking means for turni ig or tilting parts thereof'.

in a former application of mine, tiled Sept. 23, 199i, Serial No. 276,288 (pa-ten i- 1906, as No. 826,482), is disclosed a tilta ble iat platen normally occupying horizontal plane beneath the traveling machine proper' and provided vwith an elevating-spring tensioned to raise it upon release ot a l cir,

D the platen, secures it automatically normal horizontal position against the tension of the spring.- Pivoted main trachs or track-rail sections have also, heretofore, been furnished with an elevating spring, which, when the traveling machine proper is removed from these track-rail sections, as by being pushed bach onto a rest section or sections, serves to raise the pivoted tracir region. However, the use of raising springs in connection Ywith platens and trackrails or a traclframe is not unattended Ywith disadvantage; and, in reality, the utility of these spr js as elevating means is not so great. Particularly in the case et the platen, while the hand of the operator is engaged at the troit of the platen releasing the automatic lock, it would require but a scarcely appreciable amount of time to throw the platen, by hand, to raised position; and, of course, the Weight ot this member is so slight as to impose no tai; upon the strength of the operator. And, While the track-rails are slightly heavier than the platen, even these would not demand more than a slight errertion While being raised. it is obvious, too, hat, in case the traveling machine is not adapted to be removed from the pivoted track-trame, but must be raised With the latter, an elevating spring Would be practically out of' the question. u ith these conditions in view, my invention may be said to consist which, upon lowering ot' .Q ecilcaton of Letters Patent.

Apnlcaton filed January 19, 1966.

Patented Aug. 3, 1909.

Serial. No. 296,897.

much lighter than an elevating spring and is" i not subject to the Wear that Would be imposed upon such an elevating member.

ln the absence of an elevatirg sprirg, it follows that a lock for securing the tilting member in normal position solely against the tension of such a spring is no longer necessary. T-lowever, in the l'orm ci" typewriter forming the subject-matter ol' various appli cations oi nine, and which is illustrated in the accompanying drawings as embodying the present improvements, there is provided a boolnrest Which is adjustable to different thicknesses of books. in the operation oi' this iorm of book-rest, the open book is laid upon rising and falling boolr supporting leaves which automatically level the surfaces ot' the two sides of the book, and then the Whole book-rest is elevated by hand till the book presses at one side against the under side of the platen. For this reason., and to secure other advantages which vfill suggest themselves, T propose to malte provision for locking the platen in depressed as Well as in elevated position. This double-locking teature Will also be i'ound to be of value in con nection With track rails; and, as vfill become apparent, it is not essential Whether the double-locking means includes one or two locking devices, the invention. in this aspect consisting rather in the idea oi' locking a tilting member, When elevated, against depression, and, When in normal position, against raising.

A. further ieature of novelty consists in the provision oil means `lor locking the tilting membeiuat a plurality oi' elevations above normal position. Tt Will be seen that both this and the last feature contemplate means for locking the tilting member at a plurality of relative elevations.

Still another feature consists in the provision, in connection With means for locking the tilting member when depressed, o'l' means for locking the member at a plurality of elevations above normal position.

Referring to the drawings: Figure l is a sectional side elevation of a complete typewriter embodying my present improvements, the track-rails, platen and traveling machine being shown in i'ull lines in the positions Which they occupy when the parts are raised, and the same parts being shown in dotted lines in their normal or depressed positions; Fig. 2 is a sectional front elevation of the same; Fig. 3 is a side elevation on an enlarged scale of the form of locking device shown in Figs. l and 2 for securing the platen in elevated position; Fig. i is a plan view of the tali le-halil of the automatic locking device for retaining the platen in normal position; Fig. 5 is a side elevation of vanother form of automatic lock for retaining the tilting member in a plurality of positions; Fig. 6 is a front elevation of the same; Fig. 7 is a perspective View showing the form of locking device illustrated in Figs. l-S applied to a pivoted track-frame and Fig. 8 is a rear elevation of the automatic lock for securing the tracl -frame in depressed position.

ln the drawings, and more particularly in Figs. i-fl, A represents any suitable form of table or support having a transverse opening e in its top.

B is the traveling machine which moves longitudinally upon intermediately-pivoted track-rails C connected by tie-bars c to form track-frame C. The track-rails are pivoted as at c to a trunnion plate c2 which is secured to the top of the table in rear of opening a, and are designed to rest 'When in normal position upon plate c3 at the front of the opening.

D is the flat platen, Which normally occupies a plane beneath the Writing mechanism and spans the opening a in the table top, resting at its front upon plate c3 and being provided at rear and on either side with hinge members d, which are connected by pivot rod d to tiunnion plate c2.

Located in the opening a beneath the platen is the*laterally-traveling and vertically-adjustable book-rest E, Which forms the subject-matter of my co-pending application filed Sept. 23, 1901, Serial No. 76,28( and is, therefore, not now claimed specically. Said book-rest E comprises a rectangular frame e provided With rollers c traveling upon Ways c2 extending transversely Within the table top, and rising and falling leaves e" Wnich are carried by parallel arms e5 pivoted to frame e, and are connected for simultaneous movement in opposite directions by equalizing lever e Lever e is pivoted intermediate its length upon a pin e7 which projects forward from a vertical, .toothed cam-plate e? meshed by toothed pinion e9. Turningof .pinion c by handle@10 rotates the cam-plate and changes the elevation of the pivot pin e7, and consequently ol' the booksupporting leaves c3, vwhereby the book-rest may be adjusted to accommodate books of difiere/nt thickness and to force a superposed book uf'ell up underneath the platen.

The parts so far described are not specifically nev.T with this application, and hence are not claimed as separate structures, though they form parts of the several combinations hereinafter to be pointed out.

Trunnion plate e2 is provided at either end with a forwardly projecting bracket and these brackets support a rock-shaft j" which extends transversely beneath the rear of the platen and is encircled by light coil-spring` f2, for a purpose presently to be pointed out. Shaft f is furnished adjacent each hingemember d of the platen with a rigidly secured link oi' a locking device F. The complementary link f4 of each locking device is pivoted at f5 to the first link and at f to hinge member d. Adjacent its pivot f, each link is provided ivith a flat retaining face 7, Which, When the pivotal point f5 of the tiro links has been thrown forward slightly past center, engages with the under side oi' the hinge-member and prevents further movement of the links in this direction.

T he spring f2 is tensioned so as to tend to throw the links in the direction just described; and an operating handle f8 secured to one end oi' rock-shal'tj" for the purpose ol' throwing the links in the other direc-- tion. l/Vhen the platen is raised, the movement of this member straightens the links from their collapsed position shovfn in dotted lines in Fig. l, until the spring ff finally throws pivotal point 5 slightly past center. By this action the platen is automatically locked against the force of gravity, the retaining face f7 preventing the links from collapsing forward, and the position of pivot f5 past center preventing the links from collapsing rearward, whereby the links constitute a rigid brace for the platen. ln order to release the platen for depression, the handle f 8 is forced rearnfard, thereby slightly elevating the platen till pivotal point f5 is disposed to the rear of center, when the platen is lowered by its own Weight.

As already indicated, the platen is 'to be automatically locked in either its raised or depressed position. One form of device for performing this function When the platen is returned to normal position Will now be discussed. At its forward portion, the platen is provided with a depending beveled. catch g which co-acts With an automatic lock G on plate c3 of the table top. Said lock consists of an angulated lever g pivoted to upright pos-t g2 and provided with a lateral locking arm g3 and a forwardly `extending arm g5. The forwardly-extending arm (75 constitutes an operating handle for releasing the lock; and a spring gi serves to urge arm g3 constantly in a forward direction. 'When the platen is depressed, catch g rides over the front edge of arm g3, forcingl the arm to the rear till it springs into the rearwardly-opening notch {,'7 in the catch. This form of locking device is part of the subjectanatter of my oo-pendine application, Serial No. 76,288, already referred, and, while not speciiically claimed in the present appl 1ation, is selected as illustrative of one fo ol' automatic loch that i.iay be employed in accordance with my present invention for curing the platen in normal position and in connection with an automatic loclring device for retaining the same member in raised position.

As already stated, the underhy idea of my invention in this aspect is the provision of a tiltino' member, whether platen or otherwise, which is automatically locked in a plurality of positions; and in 17 is ihustrated a form of locking` device ll" constructed to locli the member in both depressed and raised positions. Said locking; device consists of a ilat bowed spring provided with a flat topf, which is in engagement with the hinge member d20 of the tilting' member, here illustrated as the platen. The hinge member is formed with two ilat locking; faces d, which form a V, and one of which is adapted to lie flat upon the top of the spring' when the platen is raised, while the otheil occupies a similar position when the platen is depressed. lid/'hen the platen is moved from one position to another the point of the V is oblig-ed to arch the top of the spring downwardly against the tension thereof, so that, in either raised or lowered position, the tilting member isn securely held.

ln 5, still another form of locking' de vice F2 is shown. ln this construction, a locking iingerfw is secured to either end of a rock-shaft f 31 passing transversely.T beneath the rear of the tilting' member, in this case being again shown as the platen. r`lie shaft is provided with an operating handlef32 and a springf, the latter being;a tensioned to turn the shaft counter-clockwise in 5. rlhe hinge-member 67,30 of the platen is provided with a plurality of rearwardly-facing lo chine; notches 07.31, into which the free end of locking` lingerfao is designed to take when the platen has been elevated to predetermined points. ln the operation of this form of my invention, the tilting' member is raised, and is followed in its upward movement by the locking' finger which moves under the actuation of its spring. At the proper moment, the free end of the finger springs behind one or other of the locking notches dgl and the platen is automatically locked against fallin-gr. To release the platen, the operating handle is pulled forward, the platen having' been lirst slightly raised, and the tilting member then descends of its own weight, forcing the locking' finger downward and forward, to which movement the light spring' jf opposes scarcely any force. lt will thus be seen that these parts constitute means for locking' the tilting' member a plurality of elevations above normal position, or, broadly, means for locking' the member at a plurality of relative elevations, which latter designation may also be applied to the constructions already discussed. addition, in the present instance, the catch g and loch G are also provided at the front of the platen, as already described in co. nection with Fig'. l. lf desirable, an al; :ement l. may be located in rear of the tilting' member to prevent its heing thrown too far to the ln Fig'. 7, l have shown the form of locking device illustrated in llig'. l applied to the track-frame. iile l have selected this particular form of locking device for illustration of the applicability of my invention to other tilting; members than. the platen, it is not to understood that the other forms of looking` device already discussed could not also be ,employed to advantage with the track-rails. track-rails, or track-rail sections pivoted at their rear ends at 62 to the trunnion plate Leasing' device F is mounted as before, ex cept that linlrl'/f4 is pivoted at f to the hinge member 02 of the track-rail. The mode of operation of the locking' device is the same as already described in connection with l.

In lligrs. 7 and 8, l have also shown an automatic locking device for securing' the track-frame in normal or horizontal position, such means constituting' a bolt t projecting' forward from plate c3 on the table top and laterally slicing' latch lil on the front of the tracloframe. Latch li is beveled upwardly on the lower surface of its projecting' end as at h', and is held at the limit of movement in one direction bv means of a spring' .712. Upon depression of the track-frame the bevel 7i. rides on the top of bolt 7L, see also Fig'. l, forcing the latch to one side against the tension of the spring, until the latter forces it into locking' position beneath the belt. rlhis form of loclzingi` device for securing;` the trachrails in horizontal position is also disclosed in my former application, Serial No. 76,288, and will therefore not be specically claimed in the present application.

What is claimed as new is:

l. ln a typewriting-machine, the combination of the following elements: a base ,z a traveling' mechanism; two members normally-supported in a horizontal plane above said base and comprising' a flat-platen and a track-frame upon which the writing-mechanism is supported and travels, one of which members is tiltable away from its normal horizontal, operative position and independent of the position of said other member a pivotal connection between the base and said ln this fleure, C represents the tiltable member; a locking device connected to said base and disposed contiguous to said pivotal connection and operative automatically toward the limit of the tilting movement ol said tiltable member to retain the same out of operative position and against return-movement after having been tilted to a predetermined point, 'where1 y elements of the typewriter underlying said member are exposed and an oscillating member connecting with the locking device and operative to actuate the same to operate the tiltablemember.

2. ln a typewriting machine, the combination of the following elements: a base; a traveling writing-mechanism; two members normally supported in a horizontal plane above said base and comprising a flat-platen and a track-frame upon which the writingmechanism is supported and travels, one el' which members is tiltable away 'from its normal horizontal position and independent of the position oi' said. other member; a pivotal connection between the base and said tiltable p member; a lock connected to said base and disposed contiguous to sald pivotal connection and automatically operative, at a plurality of undetermined points, toward the,

limit el the tilting-movement oll said tiltable member, to retain said member out of its horizontal position and against return to said position, whereby the base underlying said member is exposed and an oscillating member connecting' with the locking device and operative to actuate the same to operate the tiltable-member.

3. 1n a typewriting-machine; the combination of the following elements: a base; a traveling` mechanism; two members normally supported in a horizontal plane above said base and comprising a i'lat platen and a track-frame upon which the writing-mechanism is supportedand travels, one ol' which members is tiltable away from its normal horizontal, operative position and independent ol' the position o'll said other member; a pivotal connection between the base and said tiltable member; a locking-device connected to said base and disposed contiguous to said pivotal connection and operative automatically toward the limit ol' the tilting movement ci said tiltable member to retain the same out oi operative position and against returnmovement al ter having been tilted to apredetermined point, whereby elements ol the typewriter underlving said member are eX- posed and an oscillating member connecting with the locking-device and operative to actuate the same to operate the tiltable-member; and means for locking said member against tilting when depressed to normal position.

4. 1n a typewriting-machine, the combination of the following` elements: a base; a

traveling` mechanism; a traveling boch-support disposed below the plane ol the base; two members overlying said book-support and sustained normally in a horizontal plane on said base and comprising a flat platen and a track-'frame upon which the writing-mechanism travels, one of said members being` tiltable away Yfrom its normal horizontal position; a pivotal connection between the base and said tiltable member; a lock connected to said base and disposed contiguous to said pivotal connection and operable automatically, tov-Jard the limit of the tilting movement of said member, to retain the same out of its horizontal position and against returnmovement, whereby access to, and positioning of a bock on, the underlf'ing book-support is permitted, and an oscillating member connecting with the locking-device and operative to actuate the same to operate the tiltable-member. t

5. ln a typewriting-machine, the combination oi' the following elements: a base; a traveling-mechanism; a traveling book-support disposed below the plane of the base; two members overlying said boch-support and sustained normally in a horizontal plane on said base and comprising a flat platen and a track-frame upon which the writing-mechanism travels, one of said members being tiltable away from its normal horizontal position; a pivotal connection between the base and said tiltable member; a lock connected to said base and disposed contiguous to said pivotal connection and operable automatically, toward the limit oir' Line tiltingmovement ol said member, to retain the same out oi its horizontal position and against return-movement, whereby access to, and positioning of a book on, the underlying book-support is permitted; and an oscillating` member connecting with the locking-device and operative to actuate the same to operate the tiltable-membcr, and means for locking said. member against upward tilting after being depressed to its horizontal position.

6. 1n a typewriting-machine, the combination of the following elements: a base; a traveling writing-mechanism; a traveling book-support mounted below the plane of the base; a track-frame upon which the writingmechanism travels and overlying the booksupport; a platen also overlying the booksupport and tiltable away from the same and normally supported in a horizontal plane on the base; a pivotal connection between the base and said tiltable platen; a lock connected to said base and disposed contiguous to said pivotal connection and operable automatically, toward the limit of the tilting movement oi said platen, to retain said platen out of its horizontal position and against return-movement, whereby access to, and positioning o-a book on, the underlying` boolosupport, is permitted and means for locking said member against tilting' when depressed to normal position.

7. in a typewriting-machine, the combination with a base, and writing,` mechanism longitudinally and laterally movable thereover for line and letter spacing, of a member' normally disposed in substantially horizontal plane beneath the writing mechanism, means pivoting said member to the base lor upward tilting, a roch shaft spported on the base, means for operating said shaft, and a member operable by said shaft to lock the tilting member when elevated.

S. ln a typer-.f'ritingl machine, the combination with a base, and writing mechanism longitudinally and laterally movable thereon for line and letter spacing, of a member normally disposed a substantially horizontal plane beneath the writing mechanism, means pivotingq said member to the base for upward tilting, a roel; shaft supported on the base parallel to and adiacent the iivotal axis of tilting member, means secured to the shaft for locking; the tilting member when elofated, and operati means for the shaft.

l). ln a typen-.uiting maobine, the combination wi li a base, and w iting mechanism longitudinally and laterally movable thereon for line and letter spacing, of a member normally disposed in a substantie horizontal plane beneath the w '1g mechanism, means pivoting said member to the base for upward tilti g, a rock shaft supported on the base, a device operated by the i ci; shaft to locli the tilting member when elevated, and means for automatically oper the rock shaft for lo ching when the tiltii `j member has been ele ted to a predeteri'ninetL point.

ln a typen la iig machine, the combin with a base, and writing mechanism l v and laterally movable thereon f f line and letter spacing", of a member piv oted to the base for upi. d tiltii e, and normally di nosed in substantially horizontal 1 lane beneath the writing mechanism, a rocl ated by the rocl shaft to loclr the tilting` member when elevated, means for automatically rocking the shaft in one direction to effect locking, and manual means for rooking the shaft in the reverse direction for unlocking.

1i. ln a typewriting machine, the combination with a base, and with a writing mechanism longitudinally and laterally movable thereon for line and letter spacing, of a member pivoted to the base for upward tilting and normally disposed in a substantially horizontal plane beneath tbe writing' mechanism, a rocloshaft supported on tlie base, a device operated by the roclr shaft to lock the tilting member when elevated, a coil spring encircling the shaft and disposed to effect automatic locking, and an unlocking handle carried by the sli aft. i

l2. ln a typewriting-machine, the combi- 'nation with a base, a book-support disposed in said base, and Writing-mechanism movable longitudinally and laterally over said boolosupport, of a platen pivoted to tbe base for upward tilting and normally disposed in a pla-ne beneath the writing-nischensin, a rockshaft supported on the base parallel to and adjacent the pivotal axis of the tiltingplaten, locking-devices connecting with said shaft adjacent the two sides of, and operating to locl, the tilting-member in a tilted position away from the underlying` book-support, and means for rocking the shaft to effect lockingengagement of said devices through the platen when tilted.

i8. ln a typewriting-machine, the combi nation with a base, of a track-frame and a flat platen both supported, normally, in a horizontal position on said base, pivotal connection between the base and one of said members to permit such member to tilt upward independent of the position and operation of the other of said members, a locking element connected to said base for measuring,l the tilting-member elevated, means including a rotatable member disposed contiguous to the lock and operable to actuate said lock when the tilting-member has been elevated to a predetermined point, and manual means connecting with the said look-actuating means for releasing the locl.

ifi. 1n a typewriting-macliine, the combination of the following elements: a base, a book-support disposed below the plane of the base 5 a track-frame pivoted on said base a pivoted connection between said base and the track-frame located intermediate of the ends of the track-frame; a writing-ireolianism supported on said traclr--frame and traveling on the same to the rear of, well as in advance of, said pivotal connection wliei when said traveling writing-meclianisi the rear of said iyotal connection, the i frame is tilted; a platen overlyingI tliebooksupport and tiltable away from the same; a pivotal connection between the base and the platen 5 a lool; connected. to said base and disposed contie'uous to the pivotal connection of the platen and operable to retain the platen in its tilted position independent of the position and operation of said trackframe, whereby access to, and positioning of a bool on, the book-support is permitted and an oscillating member connecting with the locking-device and operative to actuate the same to operate the tiltable-member- 15. 1n a typewriting-macliine, the combi* nation of the following elements: a bese; a bool-support disposed below the plane of the base g a track-frame pivoted on said base; a pivotal connection between said base and the track-frame located intermediate of the ends of the track-frame a writing-mechanism supported on said track-frame and traveling on the same to the rear of, as well as in advance of, said pivotal connection whereby,when said traveling writing-mechanism is to the rear of said pivotal connection, the track-frame is tilted; a laten overlying the book-support and tiltabple away from the same; a pivotal connection between the base and the platen; a locking-device including an oscillating member connected to said base and disposed contiguous to the pivotal connection of the platen and operable to retain the platen in its tilted position independent of the position and operation of said track-frame, whereby access to, and positioning of a book on, the book-support is permitted; and means at the front end of the typewriting machine for locking the platen when depressed to its horizontal position.

16. In a typewriting machine, the combination of the following elements: a base or support, a hinged track-frame member and hinged platen member mounted for tilting movement independently of each other; locking means including a rotatable member and an engaging member, said means being connected to said support and engaging one of said hinged members to hold it in tilted position independently of the other of said hinged members.

17. ln a typewriting machine, the combination o'll the following elements: a base or support; a hinged traclr frame and a hinged platen mounted 'l'or tilting movement independently ol' each other, locking means including an engaging member connected to said base and engaging one of said parts to hold the same in tilted position independently of the other, and means including a rotatable member lor unlocking the same to permit return to normal position.

18. In a typewriting machine, the combination oi the following elements: a base or support, a hinged track-frame and a hinged platen mounted 'l'or tilting movement independent ol' each other; and automatically operable locking means including a rotatable member and an engaging member, said loclring means being connected to said base and engaging one ol' said hinged members to hold the same in tilted position independently of the other of said hinged members.

19. 1n a typewriting machine, the combination of the following elements: a base or support; a hinged track frame and a hinged platen mounted for tilting movement independently oi each other; automatically operable locking means including an engaging member connected to said base and engaging one of said parts to hold the same in tilted position independently oi' the other, and means including a rotatable member for unloclring the same to permit return to normal position.

20. ln a typewriting machine, the combination with a base, oi writing mechanism longitudinally and laterally movable thereover for line and letter spacing, ol' a tilting member normally disposed beneath the writing` mechanism, a pivotal connection between said member and the base, and means including a rock-member pivotally connected to the base to loclrthe tilting member in its tilted position.

21. ln a ftypewriting machine, the combination with a base, ol' writing mechanism longitudinally and laterally movable thereover for line and letter spacing, ol` a tilting member normally disposed beneath the writing mechanism, a pivotal connection between said member and the base, and a toggle-element for locking the tilting member.

22. ln a typewriting machine, the combination with a base, of writing mechanism longitudinally and laterally movable thereover for line and letter spacing, of a tilting member normally disposed beneath the writing mechanism, a pivotal connection between said member and the base, and means including a roch-member connecting with the base to lock the tilting member in its tilted position.

23. ln a typewriting machine, the combination with base, oi writing mechanism longitudinally and laterally movable thereover l'or line and letter spacing, of a tilting member normally disposed beneath the writing mechanism, a pivotal connection between said member and the base, and means including a rock-member connecting with the base to loci: the tilting member in its tilted position, and means lor effecting unlocking oi'l said locliing means to permit return of said tilting member to normal position.

in testimony whereof, l affix my signature,

in the presence ol' two subscribing witnesses.-

GEURGE YW. DUNNING. lflfitnesses E. T. mannose, W". L. BILLMYER. 

